[ET Trac] #2737: define CCTK_DEVICE and CCTK_HOST in Cactus

#2737: define CCTK_DEVICE and CCTK_HOST in Cactus

Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: Cactus

Cactus supports CUDA programming in the option lists level via various `CUDA_FOO` variables but does not provide macros for `__device__` and `__host__` modifiers used by both CUDA and HIP accelerators.

It would be good if Cactus could provide those depending on which compiler is detected, Predefined defines to look for are (copying AMReX): `CUDA_ARCH || HIP_DEVICE_COMPILE || SYCL_DEVICE_ONLY` (in its `include/AMReX_GpuQualifiers.H`).

-- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2737/define-cctk_device...